code: def get_driver_cls():
      return MarsActorDriver
  
file_path: mars/mars/oscar/backends/mars/backend.py
imports: from typing import Dict
  from ...backend import BaseActorBackend, register_backend
  from ..context import MarsActorContext
  from .driver import MarsActorDriver
  from .pool import MainActorPool
label_desc: Use image node_id 3 for calling the MarsActorBackend obj's underlying member method code with example usage: obj.get_driver_cls() and returns: MarsActorDriver